Select Triggers and Actions Disappearing

I had an odd one last night. A conditional trigger where the conditions and actions disappeared… with no way of gaining access to the Conditions menu. I had to delete it and recreate it. Even odder, live logging showed that it successfully ran… except nothing actually happened! It was set to trigger at 9:56 pm; I checked it at 9:55 to verify, and all looked okay. When it failed to do anything, I rechecked at 9:57. It was rescheduled for 9:56 the following evening, and showed Prev Run Time as having just executed. So now we can’t even trust the IDE logs or status!